Answer:
\[H-O\]bond is more polar than \[H-S\]
bond because of greater electro negativity difference in the bonding atoms. As
a result, \[{{H}_{2}}O\]molecules are involved in the intermolecular hydrogen
bonding and get associated to be liquid at room temperature. Since
intermolecular hydrogen bonding is negligible in the molecules of \[{{H}_{2}}S,\]
they do not get associated and remain m the gaseous state at room temperature.
For more details, consult text part (Section 7.16).
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